Make your own sleep mask or specialized glasses!
* Note that this requires a Kasina, Limina or Procyon device to drive the LEDs.
While this product works fine with the Procyon, Kasina and Limina, note that it does not have separate connections for the Left and Right sides. Both sides will light up at the same time driven by signals from the left channel of the Kasina or Limina. (The Procyon does not produce separate left & right signals)